iOS 26.5 Simulator: CPMapTemplate crashes CarPlay host — vehicleSupportsDestinationSharing unrecognized selector

[schmitzi8]

Environment: @iternio/react-native-auto-play 0.5.2 · RN 0.85.3 · Expo SDK 56 · Xcode 26.5 · iOS 26.5 Simulator (iPhone 17, 23F77)

Description

When the app sets a CPMapTemplate as the root template, the iOS 26.5 CarPlay host process (CarPlayTemplateUIHost) crashes immediately with:

NSInvalidArgumentException: -[CPSTemplateInstance vehicleSupportsDestinationSharing]: unrecognized selector sent to instance

The crash repeats in an infinite loop (731× observed in live log). The phone app continues normally — only the CarPlay surface is affected.

Crash stack (CarPlaySupport, host process)

-[CPSMapTemplateViewController _updateShareButtonVisibility]
-[CPSMapTemplateViewController _configureNavigationBarShareButton]
-[CPSMapTemplateViewController _viewDidLoad]
-[CPSBaseTemplateViewController viewDidLoad]

Two entry points, same root cause:

1. Template display: _viewDidLoad directly when setting the MapTemplate (app tap on CarPlay home screen).
2. Navigation start: hostStartNavigationSessionForTrip:reply: → _tripDidBegin:withEstimates:forIdentifier: → loadViewIfRequired → _viewDidLoad → crash.

Root cause

iOS 26.4 introduced Destination/Route Sharing (CPMapTemplate.h, #pragma mark - Destination Sharing, API_AVAILABLE(ios(26.4))). In the iOS 26.5 simulator binary:

• CPSMapTemplateViewController is initialized with a destinationSharingDelegate (<CPSDestinationSharingDelegate>).
• _updateShareButtonVisibility unconditionally calls vehicleSupportsDestinationSharing on this delegate.
• The delegate is a CPSTemplateInstance (Apple host class) that does not implement vehicleSupportsDestinationSharing → crash.

The crash is entirely within Apple's CarPlaySupport framework in the host process — app code and the library do not appear in the crash stack.

What I tried (does not help)

Implementing mapTemplateShouldProvideRouteSharing(_:) -> false on CPMapTemplateDelegate — the host still calls vehicleSupportsDestinationSharing regardless, and the crash persists.

Assessment: likely simulator-specific

No public reports of this crash on real hardware. A device-wide crash of all CarPlay navigation apps under iOS 26 would be widely documented. The simulated CarPlay "vehicle" connection appears degenerate — CPSTemplateInstance acts as a placeholder without a real capability provider.

Workaround for development: use iOS 26.3 Simulator (Destination Sharing introduced in 26.4). A separate Apple Feedback has been filed.

Questions / asks

• Is this reproducible for others on the iOS 26.x simulator? On real iOS 26 head units?
• Does the library need to adopt the iOS 26.4 destination-sharing delegate surface so the host wires up a conforming destinationSharingDelegate?
• Is there a known workaround to suppress the share-button path?

[g4rb4g3]

Sounds like another simulator issue like this one: #91